astray

adv. in the wrong direction

Astray is the sixth album from the American band, Samiam. Released in 2000 on Hopeless Records and Burning Heart Records.
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Adverb
1. away from the right path or direction; "he was led astray"
2. far from the intended target; "the arrow went wide of the mark"; "a bullet went astray and killed a bystander"
(synonym) wide

(adv. & a.)
Out of the right, either in a literal or in a figurative sense; wandering; as, to lead one astray.
  

cha4 zhi1 hao2 li2, miu4 yi3 qian1 li3
An error the breadth of a single hair can lead you a thousand miles astray.
Alternative form: 差之毫厘，失之千里 (cha4 zhi1 hao2 li2, shi1 yi3 qian1 li3).

qi2 lu4 wang2 yang2
A sheep going astray on a forked road.
Said of the impossibility of finding the truth if one goes in the wrong direction.